Malicious PDF — malware analysis report

Static analysis result for SHA-256 b465e51115795d65…

MALICIOUS

PDF

43.7 KB Created: 2020-08-08 17:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1145918af5a6fe4eb55a976a65fcc878 SHA-1: ba125d7882563f53462c39d3bfc0cf36d2cf2858 SHA-256: b465e51115795d65338d4a2a7de321a8c5659d185f3e282104bde4e1b26f8c81
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain, ttraff.ru. This suggests a link farm or SEO poisoning technique used to lure victims. The document body, though heavily obfuscated, contains the target URL, indicating an attempt to disguise malicious content as a product catalog. No scripts were extracted, but the presence of malicious redirector links is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=skf+double+row+deep+groove+ball+bearing+catalogue+pdf
    • http://files.socapital.co.nz/uploads/1/3/0/7/130738512/woxotonisudiz.pdf
    • http://files.realestatestuff.net/uploads/1/3/1/4/131438641/f4986b0d.pdf
    • http://files.breathewithlauren.com/uploads/1/3/1/4/131437351/424db3.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/jeperiwosazem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/rumifi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3563/8425/files/johnny_cash_hurt_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0437/4567/3377/files/58463970234.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/35934516637.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/accounting_cycle_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/2d_and_3d_shapes_chart.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0301/files/sebozo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/62785044038.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/dedegupamijudofeloluga.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/lelatejejovezozevovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4448/6811/files/20615474225.pdf
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/74744693359.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005497.bin
fa4cadf516ce85e84f443bb1a14bc5794e1b5c90fd46d20fa865128fe4e70d87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5497 5484 bytes
font_01_sfnt_off00006763.bin
7a62f429d7fd6c70dd41a58aa719900ac747a67e08e94f34fd1e93cf666b87e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6763 12892 bytes
font_02_sfnt_off00009103.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9103 4324 bytes

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